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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/paint/HTMLCanvasPainter.h"
#include "core/html/HTMLCanvasElement.h"
#include "core/paint/RenderDrawingRecorder.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/RenderHTMLCanvas.h"
#include "platform/geometry/LayoutPoint.h"
#include "platform/graphics/paint/ClipRecorder.h"
namespace blink {
void HTMLCanvasPainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
GraphicsContext* context = paintInfo.context;
LayoutRect contentRect = m_renderHTMLCanvas.contentBoxRect();
contentRect.moveBy(paintOffset);
LayoutRect paintRect = m_renderHTMLCanvas.replacedContentRect();
paintRect.moveBy(paintOffset);
bool clip = !contentRect.contains(paintRect);
if (clip) {
context->save();
context->clip(contentRect);
}
// FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast is set.
// See bug for more details: crbug.com/353716.
InterpolationQuality interpolationQuality = m_renderHTMLCanvas.style()->imageRendering() == ImageRenderingOptimizeContrast ? InterpolationLow : CanvasDefaultInterpolationQuality;
if (m_renderHTMLCanvas.style()->imageRendering() == ImageRenderingPixelated)
interpolationQuality = InterpolationNone;
InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
context->setImageInterpolationQuality(interpolationQuality);
toHTMLCanvasElement(m_renderHTMLCanvas.node())->paint(context, paintRect);
context->setImageInterpolationQuality(previousInterpolationQuality);
if (clip)
context->restore();
}
} // namespace blink
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